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參數資料
| 型號： | LB8658FN |
| 元件分類： | 運動控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 0.8 A, QCC44 |
| 封裝： | 6 X 6 MM, VQFN-44 |
| 文件頁數： | 7/16頁 |
| 文件大小： | 261K |
| 代理商： | LB8658FN |
LB8658FN, LB8658PL
No.7983-15/16
(8) Shutter drive “Regeneration” mode
The “Regeneration” (MD1/2/3/IN1/2 = L/L/L/H/H) in shutter mode is used to slow the coil current decay.
This mode makes coil current regenerative (Slow-Decay) within the output H-bridge by switching from
“Close” (MD1/2/3/IN1/2 = L/L/L/L/H). (Refer to the following figure.)
(1) “Close” (MD1/2/3/IN1/2 = L/L/L/L/H)
(2) “Regeneration” (MD1/2/3/IN1/2 = L/L/L/H/H)
When shutter control is switched from “Stand-by” to “Close” (“Open”), the current rises to the target
constant-current value from the state of output current 0 (zero). However, the output of the constant-current control
amplifier inside the IC is in the full drive state during the above-mentioned “Regeneration” state. Therefore, when
it is switched from “Regeneration” to “Close” (“Open”), the current falls to the target constant-current value from
the state of full drive output.
For that reason, to switch the shutter drive to “Close” (“Open”) from “Regeneration” by constant-current control,
it must be switched to “Stand-by” once before switching to “Close” (“Open”).
The example of drive sequence is shown in the figure below.
(9) GND wiring and each power supply line capacitor
Connect PGND (2 places) and SGND near the IC and insert a capacitor to the part nearest the power supply pin for
each power supply.
OUT10
OUT9
OUT10
OUT9
ILB01687
IN2
IN1
Stand-by
Close
Open
Regeneration
Stand-by
ILB01688
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